塔里木盆地塔河油田岩溶峡谷区海西早期洞穴系统发育模式

发布时间：2018-03-02 09:57

本文关键词： 古岩溶地貌古水系洞穴系统峡谷岩溶模式海西期塔河油田塔里木盆地　出处：《古地理学报》2017年02期 　论文类型：期刊论文

【摘要】：塔河油田岩溶峡谷区发育大型岩溶洞穴型储集层,勘探效果较好。基于三维地震资料、钻井资料,并结合地震属性提取技术,对地下岩溶洞穴系统、古地貌、古水文系统进行精细刻画,探讨洞穴形成机理,进而总结洞穴发育模式。研究结果表明:(1)峡谷上游段地表水垂向侵蚀作用强烈,峡谷失去了排水功能演变为干谷,下游段水动力条件减弱。(2)峡谷区岩溶洞穴类型划分为暗河洞穴、峡谷—断裂双控型洞穴。暗河洞穴主要发育在峡谷上游段,与峡谷呈"映射"关系。峡谷—断裂双控洞穴发育于峡谷两侧,垂向上具有多层性特征。(3)综上探讨峡谷区岩溶洞穴形成机理,认为较充足的水源补给条件以及水流强烈的垂向侵蚀溶蚀作用控制了暗河洞穴发育,多期次排泄基面下降以及断裂系统共同控制峡谷—断裂双控洞穴的发育。结合现代恩施地区洞穴系统特征,提出了峡谷地区洞穴发育模式,为下一步洞穴储集层预测和勘探实践提供理论借鉴。
[Abstract]:Large karst cavernous reservoirs are developed in the karst canyon area of Tahe Oilfield. Based on 3D seismic data, drilling data and seismic attribute extraction technology, the paleogeomorphology of underground karst cave system is studied. The paleohydrological system was carefully depicted, the mechanism of cave formation was discussed, and the cave development model was summarized. The results show that the vertical erosion of surface water in the upper reaches of the valley is strong, and the drainage function of the canyon has lost its drainage function and evolved into a dry valley. The karst cave types in the canyon area are divided into dark river caves, canyon-fault double-controlled caves, and dark river caves are mainly developed in the upper reaches of canyons. The relationship between canyon and canyon is "mapped". Canyon-fault double-controlled cave develops on both sides of canyon, and vertical upward has multi-layer character.) the formation mechanism of karst cave in canyon area is discussed in this paper. It is considered that adequate water supply conditions and strong vertical erosion and dissolution of water flow control the development of caves in the Shadow River. The development of canyon-fault double-controlled cave is controlled by multi-stage drainage base and fault system. Based on the characteristics of cave system in modern Enshi area, a cave development model in canyon area is proposed. It provides theoretical reference for the prediction and exploration practice of cave reservoir in the next step.
【作者单位】：新疆农科院土壤肥料与农业节水研究所;中国地质大学(武汉)资源学院;中国石化西北油田分公司勘探开发研究院;长江大学地球科学学院;
【基金】：国家重大基础研究发展项目“973”计划(编号:2012CB214804)资助~~
【分类号】：P618.13

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